7287949 has 4 divisors (see below), whose sum is σ = 7304220. Its totient is φ = 7271680.

The previous prime is 7287947. The next prime is 7287953. The reversal of 7287949 is 9497827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9497827 = 23 ⋅412949.

It can be written as a sum of positive squares in 2 ways, for example, as 1087849 + 6200100 = 1043^2 + 2490^2 .

It is a cyclic number.

It is not a de Polignac number, because 7287949 - 2¹ = 7287947 is a prime.

It is a super-2 number, since 2×7287949² = 106228401253202, which contains 22 as substring.

It is a Duffinian number.

7287949 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7287899 and 7287908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7287947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7444 + ... + 8365.

It is an arithmetic number, because the mean of its divisors is an integer number (1826055).

Almost surely, 2^7287949 is an apocalyptic number.

It is an amenable number.

7287949 is a deficient number, since it is larger than the sum of its proper divisors (16271).

7287949 is a wasteful number, since it uses less digits than its factorization.

7287949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16270.

The product of its digits is 254016, while the sum is 46.

The square root of 7287949 is about 2699.6201584667. The cubic root of 7287949 is about 193.8809362592.

The spelling of 7287949 in words is "seven million, two hundred eighty-seven thousand, nine hundred forty-nine".